IOS 12 beta Release Notes - Developer - MacRumors Forums
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iOS 12 beta Release Notes Developer
About iOS 12 beta ...........................................................................................2
Bug Reporting .............................................................................................................2
Technical Support and Learning Resources................................................................2
Notes and Known Issues .................................................................................3
General........................................................................................................................3
3rd Party Apps ............................................................................................................3
Accessibility ................................................................................................................3
Activity ........................................................................................................................3
App Store .................................................................................................................... 3
Apple Pay ....................................................................................................................4
ARKit ...........................................................................................................................4
CallKit..........................................................................................................................4
CarPlay........................................................................................................................4
CoreGraphics ..............................................................................................................4
CoreML .......................................................................................................................4
Keyboards ...................................................................................................................5
Localization .................................................................................................................5
MediaPlayer Framework .............................................................................................5
Model I/O .................................................................................................................... 5
Networking ..................................................................................................................5
Personal Hotspot ........................................................................................................6
Phone & FaceTime ......................................................................................................6
Photos .........................................................................................................................7
ReplayKit .....................................................................................................................7
Safari & WebKit ........................................................................................................... 7
Screen Time ................................................................................................................7
Siri ...............................................................................................................................8
UIKit ............................................................................................................................8
USB Accessories.........................................................................................................8
Voice Memos ..............................................................................................................9About iOS 12 beta
The iOS 12 SDK provides support for developing iOS apps for iPhone, iPad, or iPod touch
devices running iOS 12. The SDK comes bundled with Xcode 10 available from the Apple
Developer Program download page.
For information on the compatibility requirements for Xcode 10, see the Release Notes on the
Xcode download page.
Bug Reporting
For issues not mentioned in Notes and Known Issues, file bugs through the Apple Developer
website https://developer.apple.com/bug-reporting/.
When filing a bug, please include the full version number in the bug title and in the description.
This looks like “12 (16Axxxx).” You can find the full version number in Settings > General >
About > Version.
Technical Support and Learning Resources
Apple provides the following resources to support your development:
• Developer documentation is available both on https://developer.apple.com/
documentation and from Xcode by choosing Help > Developer Documentation.
• Apple Developer Forums. Participate in discussions about developing for Apple platforms
and using developer tools.
• iOS 12 Developer Forum. Participate in discussions about developing for iOS 12 and
issues with the SDK.
• iCloud for Developers. Find information about developing for iCloud.
• iOS homepage. Get high-level information about the latest release of iOS. Download
current and beta iOS releases.
• For help with using Xcode, Simulator, or Instruments, choose Help > app name Help.
2018-06-04 | Copyright © 2018 Apple Inc. All Rights Reserved.
Page 2 of 9Notes and Known Issues
General
New Issues
• The ”Maps Nearby” widget buttons don't launch the Maps app. (40099072)
• Opening an iWork document via AirDrop or Files app might cause the device to become
unresponsive. (40338520, 40694399)
Workaround: Reboot the device.
• Time Zones might not update automatically. (40499996)
Workaround: Set the Time Zone manually using Date & Time in Settings > General.
• When deploying apps to iOS 11 or earlier, JPEG image assets are not included in the
compiled .car file. (40507731)
• Universal Links might not open the expected target app. Please submit a bug report if you
experience this problem. (40568385)
3rd Party Apps
New Issues
• Skype might unexpectedly quit after logging in. (39666451)
• Some EA games (Real Racing 3, Sims 3 Free Play) might unexpectedly quit on launch.
(39847417)
• Some users might be unable to log in to or view account information in the Bank of
America app. (39975169)
• Citi Mobile might unexpectedly quit on launch. (40205739)
Accessibility
New Issues
• Platform Switching for Switch Control is unavailable in iOS 12 beta. (40035312)
• Sysdiagnose initiation via the Analytics menu item in AssistiveTouch and Switch Control is
currently unavailable. (40504710)
• Newly-created calendar events might be unavailable to VoiceOver. (40555552)
Activity
New Issues
• The route map for a workout might be unavailable. (40008565)
App Store
New Issues
• Signing into a previously-used sandbox account during the In-App Purchase flow might
produce unexpected results. (40639792)
2018-06-04 | Copyright © 2018 Apple Inc. All Rights Reserved.
Page 3 of 9Workaround: Sign in using the Settings > App Store > Sandbox Account menu.
Apple Pay
New Issues
• When an Apple Pay payment sheet is presented in Safari on a Mac without Touch ID, you
won't be able to confirm the payment if your iPhone or Apple Watch display is off.
(40384791)
Workaround: Wake your iPhone or Apple Watch display before attempting the
transaction.
ARKit
New Issues
• Certain USDZ models loaded in Safari might not render thumbnail images. (40252307)
CallKit
New Issues
• To enable CallKit extensions, it might be necessary to quit and relaunch Phone, Messages,
or Settings apps. (39548788, 39885031)
CarPlay
New Issues
• Alarms are currently unavailable while using CarPlay. (39159434)
CoreGraphics
New Issues
• Various CoreGraphics calls have been hardened against continuing with invalid
parameters. In iOS 12 beta, these calls may now return NULL or return early. (38344690)
CoreML
New Features
• Support for quantized models (≤ 8-bit linear and/or lookup table)
• Support for flexible image sizes and multi-array shapes
• Batch prediction API
• Support for custom models
• Support for Create ML models (Vision Feature Print, Text Classifier, Word Tagger)
New Issues
• When layers are quantized• Models with flexible input sizes may unexpectedly reject an input using the default size
displayed in Xcode’s type field. (40632323)
Workaround: Supply a non-default size input on first prediction call.
Keyboards
New Issues
• While typing in certain apps, keyboard suggestions may overlap. (40231537)
Workaround: Close and re-open the app or document.
Localization
New Issues
• Certain languages may exhibit clipped or misaligned layout. (40420329)
• Certain languages may display unlocalized text. (40420422)
MediaPlayer Framework
New Issues
• When a queueTransaction is performed on applicationQueuePlayer to modify
the position of a song, the queue returns unchanged. (39401344)
• A song cannot be added to a playlist using the addItemWithProductID API.
(40508800)
Model I/O
New Issues
• In .obj models, the bump semantics in .mtl files don't map to
MDLMaterialSemanticTangentSpaceNormal. (40665817)
Workaround: Use MDLMaterialSemanticBump instead.
Networking
New Features
• The NSURLSession HTTP/2 implementation has been updated to support HTTP/2
connection reuse per RFC 7540 Section 9.1.1. This requires an HTTP/2 server to present a
certificate which covers more than one server hostname. The certificate may use the
Subject Alternative Name extension or wild-carded domain names. In addition,
NSURLSession requires name resolution to resolve the different hostnames to the same
IP address. NSURLSession may reuse HTTP/2 connections across different domain
names when these conditions are satisfied. (37507838)
2018-06-04 | Copyright © 2018 Apple Inc. All Rights Reserved.
Page 5 of 9Deprecations
• FTP and File URL schemes for Proxy Automatic Configuration (PAC) are deprecated.
HTTP and HTTPS are the only supported URL schemes for PAC. This affects all PAC
configurations including, but not limited to, configurations set via Settings, System
Preferences, profiles, and URLSession APIs such as
URLSessionConfiguration.connectionProxyDictionary, and
CFNetworkExecuteProxyAutoConfigurationURL(). (37811761)
Personal Hotspot
New Issues
• Personal Hotspot might be unavailable. (40379017)
Phone & FaceTime
New Issues
• In iOS 12 beta, Group FaceTime is available only on iPhone 7 or later and is unavailable on
iPad.
• In iOS 12 beta, Camera Effects in Messages is available only on iPhone SE and iPhone 6s
or later and is unavailable on iPad. Camera Effects in FaceTime is available only on iPhone
7 or later and is unavailable on iPad.
• During a Group FaceTime call, the text overlay feature might remain invisible until the
preview window is moved downward. (40395097)
• Attempting to add an additional participant to a FaceTime call with many participants
might not succeed. (40433480)
• During a FaceTime call, iPad Pro (10.5-inch), iPad Pro (12.9-inch) (2nd generation), and
iPad (6th generation) don't send video to the receiving device. (40725406)
• Wi-Fi calls might end unexpectedly when transitioning from Wi-Fi to cellular while on the
T-Mobile network. (39251828)
• Voicemail notifications might be inconsistent and not appear when the device is locked.
(39826861)
• The Calls on Other Devices using your carrier account feature is unavailable on iOS 12
beta. (40180205)
• Users might be unable to configure Call Forwarding. (40362744)
• Wi-Fi Calling might be disabled after updating to iOS 12 beta. (40467667)
Workaround: Switch Wi-Fi Calling back to On in Settings > Phone.
• Apple Watch Series 3 (GPS + Cellular) customers using the Bell network in Canada might
experience an error message when attempting to sign up for a cellular plan or when
attempting to access ‘Manage Bell Account’. (40556479)
2018-06-04 | Copyright © 2018 Apple Inc. All Rights Reserved.
Page 6 of 9Photos
New Issues
• Search results might be unavailable when using languages other than English.
(39781553)
ReplayKit
New Issues
• There is no default icon for RPBroadcastPickerView. (38813581)
Workaround: Add an image or label as a subview to RPBroadcastPickerView.
• Broadcasting will be enabled in a future release. (40342264)
Safari & WebKit
New Issues
• Rotating the device while viewing a PDF in Safari might prevent the PDF from scrolling or
maximizing layout width. (39794462)
• Viewing Wallet passes in SFSafariViewController might be unavailable.
(40415649)
Workaround: View the pass in Safari.
Screen Time
New Issues
• App usage data isn't removed after an app has been deleted. (39428587)
• Screen Time settings don't sync between devices; however, usage data is synced.
(39660477)
• Usage breakdown by app is unavailable in iOS 12 beta. (39697268)
• “Picked Up Phone” statistics might be inflated due to data syncing from other devices
signed into the same iCloud account. (39917173)
• Screen Time website usage for a child won't be displayed on the parent’s device, but
might be read on the child’s device. (40218447)
• The default Always Allowed apps won't be allowed in Downtime until after tapping
Settings > Screen Time > Always Allowed to refresh the list of apps. (40320173)
• Users might receive multiple Screen Time Weekly Report notifications. (40401895)
• Apps and Websites might be disabled even after Screen Time is disabled. (40656766)
Workaround: Click the Ignore Limit button and Select Remind Me or Ignore.
• Modifying Time for an App Limit overwrites customized days without warning.
(40668188)
• Use only numbers when creating a Screen Time passcode or it might become impossible
to enter the passcode. (40671666)
2018-06-04 | Copyright © 2018 Apple Inc. All Rights Reserved.
Page 7 of 9• Some child iCloud accounts might not report usage data back to the parent’s device.
(40749009)
Siri
New Issues
• Siri might produce unexpected responses to “Where is my…” queries. (39531873)
• Messages might not launch when tapping on message content. (39941268)
Workaround: Exit Siri and launch Messages.
• Adding shortcuts to Siri might fail for shortcuts with images in PDF format. (40395673)
Workaround: Use another image format.
• In Swift, the shortcut property of INVoiceShortcut must be accessed as
__shortcut. (40418400)
• Assigning a value to a parameter which begins with a capital letter throws
NSUnknownKeyException. (40464710)
Workaround: Start the parameter name with a lowercase letter.
• When performing a shortcut in Siri, custom responses won't be included in the
confirmation dialog text which Siri reads. (40562557)
• Siri Suggestions for Shortcuts are enabled on iPhone 6s or later, iPad Pro, iPad (5th
generation or later), iPad Air 2, and iPad mini 4. (40669231)
UIKit
New Issues
• Presenting a UIImagePickerController might cause the app to be terminated with a
privacy violation if the app does not include the NSMicrophoneUsageDescription
key in its Info.plist. (40490417)
Workaround: Add the NSMicrophoneUsageDescription key to the application’s
Info.plist.
USB Accessories
New Features
• To improve security, iOS 12 beta may require you unlock your passcode-protected iPhone,
iPad, or iPod touch in order to connect it to a Mac, PC, or USB accessory.
• If you use iPod Accessory Protocol (iAP) USB accessories over the Lightning connector
(such as CarPlay, assistive devices, charging accessories, or storage carts) or you
connect to a Mac or PC you might need to unlock your device to recognize the accessory.
If you don't unlock your device, it won't communicate with the accessory or computer, and
it won't charge. Note that you don't need to unlock your device to charge using an Apple
USB power adapter.
• If a USB accessory isn't recognized after you unlock your device, disconnect it, unlock
your device, and reconnect the accessory.
2018-06-04 | Copyright © 2018 Apple Inc. All Rights Reserved.
Page 8 of 9• If you normally use a USB assistive device to enter your passcode, you may allow it to
communicate with your device while it is locked by enabling “USB Accessories” in
Settings > Face ID/Touch ID & Passcode.
Voice Memos
New Issues
• Voice Memos don't sync to iTunes. (40346169)
2018-06-04 | Copyright © 2018 Apple Inc. All Rights Reserved.
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